Image rotation and transformation

Hello experts,

as a beginner in Matlab, i have some problems with the rotation of image from the center point.

Problem defination:

I took the image at 30° from the left side of the picture. Now i want to rotate the image from the center point for -30° in the right direction to achive the proper (flat) image for the analysis.

How can i solve this problem?

Is there any tutorial or scripts or manual for these types of problems?

Thank you in advance.

Best regards

Vivek

[John Marriott]

Hi Vivek,

If I have understood correctely and you want to rotate 30 degress counterclockwise you can use the imrotate function e.g newimage = imrotate(oldimage, 30)

[Vivek Vora]

Hi John,

thank you for your quick answer.

Actually, i want to tilt my image 30° up from left side, that means vertical rotation. Since my image is 2D, and i want to rotate it in a 3D space, i think my transformation is not a rotation but it should be projection.

Answer 1

[Image Analyst]

You can apply your own custom rotation matrix by using https://en.wikipedia.org/wiki/Rotation_matrix

Or call imtranslate() to shift the rotation point to the center of the image, then call imrotate(), then imtranslate() again to shift it back to where it was.